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Aqueon is or was a similar device to PowerSwim.California Institute of Technology graduate Calvin "Cal" Gongwer began work on improvements to human propulsion through water in the 1950s and established Innerspace Corporation, an aquatic propulsion company which specialized in submersible thrusters at the time.
Berkley is a fishing tackle company founded in Spirit Lake, Iowa, in 1937 [1] as Berkley Fly Co. by Berkley Bedell. History. The Jarden Corporation acquired ...
A Z-Drag or Z-Rig is an arrangement of lines and pulleys, effectively forming a block and tackle, that is commonly used in rescue situations. [1] The basic arrangement results in pulling the hauling end 3 times the distance the load is moved, providing a theoretical mechanical advantage of three to one .
A block and tackle [1] [2] or only tackle [3] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.
hobbyist-built DPV with T500 thrusters . A DPV usually consists of a pressure-resistant watertight casing containing an underwater thruster, or a battery-powered electric motor, which drives a propeller The design must ensure that the propeller cannot harm the diver, diving equipment or marine life, the vehicle cannot be accidentally started or run away from the diver, and it remains ...
The Texas rig is a fishing rig used for angling with soft plastic lures. [1] [2] It comprises a bullet weight or similar sliding fishing sinker, an offset worm hook, and a soft plastic lure. [3] Diagram of a Texas rig comprising a soft plastic worm (green), bullet weight (grey), hook (black), and fishing line (blue) A Texas-rigged ribbontail worm
The Puretic power block is a special kind of mechanised winch used to haul nets on fishing vessels. The power block is a large pulley of aluminium with a hard rubber-coated sheave . While many men were needed for the back-breaking work of hauling a purse seine manually, the same work could be done by fewer men with a power block.
Boats used in the sport of rowing may be adjusted in many different ways according to the needs of the crew, the type of racing, and anticipated rowing conditions. The primary objective of rigging a boat is to accommodate the different physiques and styles of rowing of the crew in such a way that the oars move in similar arcs through the water, thus improving the crew's efficiency and ...